Make XML the default configuration format

Signed-off-by: Luís Cobucci <[email protected]>

Author: lcobucci

README.md

@@ -121,19 +121,20 @@ vendor/bin/roave-backward-compatibility-check --help
 
 ## Configuration
 
-The file `.roave-backward-compatibility-check.json` is read from the current working directory (when it exists) and sets configuration for the command.
+The file `.roave-backward-compatibility-check.xml` is read from the current working directory (when it exists) and sets configuration for the command.
 
-It's expected to be a JSON encoded file that, optionally, contains the following properties:
-
-* `baseline`: list of regexes used to filter detected changes; useful to avoid detection of known BC-breaks
+It's expected to be an XML file that follows our [schema](resources/schema.xsd):
 
 **Example:**
 
-```json
-{
-  "baseline": [
-    "#\\[BC\\] CHANGED: The parameter \\$a of TestArtifact\\\\TheClass\\#method()#",
-    "#\\[BC\\] CHANGED: The parameter \\$b of TestArtifact\\\\TheClass\\#method2()#"
-  ]
-}
+```xml
+<?xml version="1.0" encoding="UTF-8" ?>
+<roave-bc-check
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="vendor/roave/backward-compatibility-check/resources/schema.xsd">
+    <baseline>
+        <ignored-regex>#\[BC\] CHANGED: The parameter \$a of of TestArtifact\\TheClass\#method\(\)#</ignored-regex>
+        <ignored-regex>#\[BC\] CHANGED: The parameter \$b of of TestArtifact\\TheClass\#method2\(\)#</ignored-regex>
+    </baseline>
+</roave-bc-check>
 ```

src/Command/DetermineConfigurationFromFilesystem.php

@@ -8,14 +8,14 @@
 use Psl\Type;
 use Roave\BackwardCompatibility\Configuration\Configuration;
 use Roave\BackwardCompatibility\Configuration\ParseConfigurationFile;
-use Roave\BackwardCompatibility\Configuration\ParseJsonConfigurationFile;
+use Roave\BackwardCompatibility\Configuration\ParseXmlConfigurationFile;
 use Symfony\Component\Console\Output\OutputInterface;
 
 /** @internal */
 final class DetermineConfigurationFromFilesystem
 {
     public function __construct(
-        private readonly ParseConfigurationFile $parser = new ParseJsonConfigurationFile(),
+        private readonly ParseConfigurationFile $parser = new ParseXmlConfigurationFile(),
     ) {
     }
 

test/e2e/Command/AssertBackwardsCompatibleTest.php

@@ -30,12 +30,14 @@ final class AssertBackwardsCompatibleTest extends TestCase
 
 JSON;
 
-    private const BASELINE_CONFIGURATION = <<<'JSON'
-{
-    "baseline": ["#\\[BC\\] CHANGED: The parameter \\$a of TestArtifact\\\\TheClass\\#method()#"]
-}
-
-JSON;
+    private const BASELINE_CONFIGURATION = <<<'XML'
+<?xml version="1.0" encoding="UTF-8" ?>
+<roave-bc-check>
+    <baseline>
+        <ignored-regex>#\[BC\] CHANGED: The parameter \$a of TestArtifact\\TheClass\#method.*#</ignored-regex>
+    </baseline>
+</roave-bc-check>
+XML;
 
     private const CLASS_VERSIONS = [
         <<<'PHP'
@@ -273,15 +275,15 @@ public function testWillPickLatestTaggedVersionOnNoGivenFrom(): void
 
     public function testWillAllowSpecifyingBaselineConfiguration(): void
     {
-        File\write($this->sourcesRepository . '/.roave-backward-compatibility-check.json', self::BASELINE_CONFIGURATION);
+        File\write($this->sourcesRepository . '/.roave-backward-compatibility-check.xml', self::BASELINE_CONFIGURATION);
 
         $output = Shell\execute(__DIR__ . '/../../../bin/roave-backward-compatibility-check', [
             '--from=' . $this->versions[0],
             '--to=' . $this->versions[1],
         ], $this->sourcesRepository, [], Shell\ErrorOutputBehavior::Append);
 
         self::assertStringContainsString(
-            '.roave-backward-compatibility-check.json" as configuration file',
+            '.roave-backward-compatibility-check.xml" as configuration file',
             $output,
         );
     }